When I think of the most unusual piano, though, I don't think about looks. I think about the experience of playing it. Hands down, I think the Bosendorfer Model 290 Imperial Piano truly gives the most unusual playing experience.
The 3 major factors of tone production involving the bow are weight, placement and speed. These 3 factors all relate to each other. Weight means the amount of weight the player puts on the bow, placement refers to the placement of the bow between the fingerboard and the bridge and speed refers to how fast or slow the bow moves across the string.